Description:
The idea seems prevalent among men operating small
properties in the mining districts of Arizona that the smelters
and custom mills do, in many cases, give false returns on
ores that are sent in for smelting or treatment. With a view
to ascertaining the facts "of the case, the Arizona State Bureau
of Mines has conducted an investigation and has found that
it would be utterly impractical for any smelter or mill to
so falsify its method of sampling as to give low returns and
still give the shipper one half of the sample to allow check
assays to be made.
This bulletin is written with the idea of showing the"
small shipper how to sample, so that he may sample his ores
before shipment and ascertain the correct value so that he
may have a check on the smelter. Smelter methods of sampling
are also given, so that the reader may determine for himself,
that, owing to the great changes in the routine and the
large number of men that would be necessary in any falsifying
system, the smelters could not afford to give incorrect returns. 14 p.